1. Division of Oral Biology, University of Pittsburgh School of Dental Medicine, 618 Salk Hall, 3501 Terrace St., Pittsburgh, PA 15261, Department of Dentistry, Wake Forest University School of Medicine, Winston-Salem, NC, Department of Human Genetics, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, PA
2. Department of Periodontics, University of Taubate-Sao Paulo, Brazil
3. Dcpartment of Oral Pathology, University of Camp in as, Piracicaba, Brazil
4. Division of Oral Biology, University of Pittsburgh School of Dental Medicine, 618 Salk Hall, 3501 Terrace St., Pittsburgh, PA 15261, Department of Human Genetics, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, PA, Cleft Palate-Craniofacial Center, University of Pittsburgh, School of Dental Medicine, Pittsburgh, PA, Department of Psychiatry, University of Pittsburgh, School of Medicine, Pittsburgh, PA
5. Department of Human Genetics, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, PA